The circuit shown is from 1994 National Semiconductor documentation but can be implemented with more modern operational amplifiers. The power supply must be symmetrical.
This circuit transmits signals to an FM receiver at a distance of up to a few tens of meters. The...
In this circuit the CA3140, an operational amplifier, is used as a comparator with the zener diode...
This circuit is one of many that we have in our section. It was taken from the Electronics...